Feed arrangement for tube-boilers.



L. M. G. DELAUNAY-BELLEVILLE. FEED ARRANGEMENT FOR TUBE BOILERS.

APPLICATION FILED SEPT. 30, 19 07.

Patented Aug.30,1910.

3 SHEETS-SHEET 1.

CD CD L. M. G. DELAUNAY-BELLEVILLE.

FEED ARRANGEMENT FOR TUBE BOILERS.

APPLICATION FILED SEPT. so, 1907,.

ig. Z.

Patented Aug. 30,1910.

3 SHEETS-SHEET 2.

L. M. G. DELAUNAY-BELLEVILLE. FEED ARRANGEMENT FOR TUBE BOILERS.

APPLIOATION FILED SEPT. 30, 1907. I 7 9 9,042, Patented Aug. 30, 1910.

3 SHEETSSHEET 3.

UNITED STATES PATENT oFFIc LOUIS MARIE GABRIEL DELAUNAY-BELLEVILLE, OFPARIS, FRANCE, ASSIGNOR TO SOCIETE ANONYME DES ETAIBLISSEMENTSDELAUNAY-BELLEVILLE, OF ST. DENIS,

FRANCE, A. CORPORATION OF FRANCE.

FEED ARRANGEMENT FOR TUBE-BOILERS.

Specification of Letters Patent.

Application filed September 30, 1907.

Serial No. 395,207.

To all whom it may concern:

Be it known that I, LoUIs MARIE GABRIEL DELAUNAY-BELLEVILLE, citizen ofthe French Republic, residing at Paris, Department of Seine, in France,have invented certain new and useful Improvements in Feed Arrangementsfor 'Water-Tube Boilers, of which the following is a specification.

The present invention relates to improvements in feed mechanism forwater tube boilers and is applicable more especially to boilers whenused on board ship, the object of the invention being primarily toprovide means for insuring uniform distribution of the feed water atboth sides of each boiler, irrespective of the tilting thereof due tothe heeling of the ship.

Among the important advantages of the present invention are that theheating tubes for the feed water may be arranged as low as possible soas to render them conveniently accessible for inspection and repair andthe height of the boiler may be materially reduced in those cases inwhich economizers for feed water heaters are arranged above the steamdrum.

In marine installations, it has been the 'tendency to make each boileras large as possible in order to reducethe number of units to be used,and as the length of the grates is limited by the peculiar conditionsexisting in such installations, it is possible only to increase thewidth of the boilers in order to augment the capacity thereof. By soincreasing the width of the boiler, however, there is difficulty ininsuring uniform distribution of the feed water and this difficulty isincreased in such marine installations wherein the boiler gang-Ways runtransversely of the ship, the permanent or temporary inclinations of theship causing a corresponding lateral inclination of each boiler thatrevents an e ual feed of the water to bot sides thereof.

The present invention obviates the difficulties above mentioned and itis applicable either to generators having a vaporizing nest only, or tothose which are provided with a feed water heater and with a superheaterfor the steam, and these applications of the invention will behereinafter set'forth.

In the accompanying drawing, the invention is shown in connection with amarine boiler which is provided with a feed Water heater, thisembodiment of the invention being shown merely as an example.

Figure 1 of the drawing represents a front elevation of a boiler orgeneratorv constructed in accordance With the present invention, thedoors for the. tube boxes at the Patented Aug. 30, 1910.

Similar parts are designated by the same reference characters in theseveral views.

In the present embodiment of my invention, I have shown the same asapplied to a steam generator which is especially adapted for marinepurposes, it comprising generally a furnace having a front 1 and acombustion chamber, grates and ash-pans as usual, the tube chambersbeing provided with doors 3 for permitting access to the steamgenerating units, similar doors 4- being' arranged above the doors 3 forproviding access to the feed water heater. Mounted within the combustionchamber of the furnace is a generating or vaporizing element C which iscomposed in the present instance of a pair of laterally arranged unitsof the water tube type. Mounted above the vaporizing element is a feedwater heater D composed of any suitable number of units, a set of threeunits being shown in the present instance which are also of the watertube type. A horizontal transversely extending steam collector andpurifier E is mounted so as to extend across the top of the generatorand in a direction from one side of the same to the other, a set ofupright pipes 6 connecting the upper portions of the generator orvaporizing units with said collector, the upper ends of these pipesextending into the collector and discharging at a suitable distanceabove the bot-tom thereof, as shown. A pair of main water return pipes Fare attached to the opposite ends of the collector E and are providedwith inwardly extending portions discharge pipes which enter a feedcollector G, the latter communicating with the lower of the generatorunits C. A pair of supplemental water return pipes are connected by thejunction boxes 5 to the main return pipes F, these supplemental returnpipes being inclined toward those ends which discharge in said junctionboxes, and their upper ends extend inwardly to points in proximity tothe middle of the steam collector E at which points these. supplementalreturn pipes communicate with the steam collector. The steam collectoris divided by means of a partition M which extends transversely acrossthe lower portion of the steam collector at a point between the entranceto the supplemental return pipes. This partition serves in effect todivide the steam collector into two water compartments, and it' is ofsuch a height as to prevent all of the water contained in the steamcollector from flowing to one end thereof and thus leaving the remainingreturn pipes uncovered when the ship has a list or inclination towardport or starboard.

A feed collector H extends transversely across the generator and isconnected by means of the branch pipes 8 with the several units of thefeed water heater D, and feed water is supplied to this feed collectorthrough the medium of a pair of automatic feed water regulators 6 of aconstruction to be hereinafter described, these feed water regulatorsbeing arranged at the opposite sides of the generator and are connectedto.

a suitable source of feed water supply capable of forcing the feed waterthrough the feed water heater and into the steam collector against theboiler pressure, a feed pump being usually employed for this purpose. Inthe present instance, these automatic feed water regulators areduplicates, and a description of one will be sufficient for both.

Each regulator comprises a casing which forms a chamber for a float 38,this float chamber being connected to the water space of the boiler bymeans of a pipe 33 which enters the bottom thereof, and a pipe 34 whichenters the top ofsuch chamber whereby the level of water contained inthe float chamber will correspond with the level of water in that sideof the boiler to which the regulator is connected. In Fig. 1, thesepipes 33 and 34 are shown as connected to the tubes of the correspondingvaporizing element C. The float chamber may be provided with agage-glass 6' whereby the level of water therein may be readilyascertained. Guided to operate vertically within the float chamber is afloat 38 the upper end of which is pivotally connected to an arm 39which arm in turn is pivoted upon the bearing 39, the outer end of thearm 39 operatin upon a plunger 40 which operates throug a stufl'- levelat which the water is ing-box in the wall of the float chamber and bearsupon the regulating lever 41. This lever 41 is pivoted upon a bearing 41supported by the float chamber, and at one side of this hearing isarranged a valve-operating stem 42, the latter being pivoted to the regulating lever 41. The opposite end of the lever 41 is provided with acounterweight 43 and also a controlling s ring 44. One or morecounterweights may be used, and each may be composed of a pluralitywhereby it is possible to adjust at will the to be maintained in theboiler. The spring 44 is provided for the purpose of absorbing any shockor vibration due to the hydraulic recoil of the feed water pump. Thevalve rod 42 passes through a stufling-box and into the feed waterregulator casing 35 which communicates with the pumps or other means forsupplying the feed water to the boiler, this casing having a seatto'cooperate with avalve 36 which is fixed to the valve stem 42 andserves to control the passage of the feed water into the boiler. A checkor nonreturn valve 37 may also be provided for the regulator casing 35at a point between the valve 36 and the pumps. Each regulator casing 35is connected to the corresponding side of the feed collector H by meansof the pipes 7, and these pipes may be provided with suitable checkvalves for preventing return flow of the feed water from the boiler tothe regulators. These two automatic feed regulators supply to. therespective sides of the generator quantities of water that are regulatedaccording to the" degree of inclination of the generator, is to say,when the generator is level, the level of water in both feed regulatorsis the same, and the openings through the valves 36 of both regulatorsare open to an equal extent. Should the generator, however, becomeinclined, say to the left, by reason of the listing or heeling of theship or vessel, the water rises in the left hand teed regulator, liftingits float 38 which operating through the arm 39, stem 40, lever 41 andvalve stem 42, will cause a decrease in the opening provided by thevalve 36 of this feed regulator whereby the amount of water fed to thelower side of the boiler through the respective regulator will bedlminished. A corresponding fall of the water level naturally takesplace in the float chamber of the right hand regulator whereby the areaof the opening provided by the corresponding regulating valve will beincreased.

It will be understood, of course that the amount of increase in the areaof the aperture of the right hand feed regulator is proportional to thedecrease in the area oi the aperture of the left hand feed regulator sothat the sum of the apertures of the two feed regulators remainssubstantially conof disks that stant notwithstanding the rolling motionsof the vessel, thereby insuring a proper supply of water to thegenerator such as is required for the generation of steam under allconditions.

A discharge pipe 9 leads from the upper portion of each unit of the feedwater heater D, these discharge pipes being connected by the branchpipes 10, 11 and 12, respectively, to a manifold i which extendslongitudinally of the steam collector E, and this manifold is providedwith a pair of inlets I which lead therefrom and dischar e into thesteam collector E at points suit-a lyspaced from its ends, suitablenon-return valves being provided for the respective inlets as shown inFig. 3, the collector E thus serving as a common receptacle for the faedwa'ter discharged from the several units of the feed water heater.

Any suitable devices may be employed for efiiciently conducting theheated or burning gases through the vaporizing and feed water heatingelements, perforated battle plates 13 being suitably arranged betweenthe pipes composing the feed water heater, and similar perforated baflieplates 14 are suitably arranged with reference to the pipes composingthe vaporizing element, a screen 15 being preferably interposed betweenthe vaporizing and feed water heating elements.

In the present embodiment of the invention, a pair of longitudinallyextending steam supply pi es 129 are mounted in the upper portion 0 thecollector E, the outer ends of these pipes being closed and the innerends thereof discharge into a steam supply chamber 30 from which thesteam may be drawn for use. A pair of pockets 31 are mounted in thecollector E at a level below the steam supply pipes and such pockets arearranged to receive the feed water which. is introduced into thecollector through the inlets I. A pair of baflie plates or covers 32 arealso preferably mounted so as to extend horizontally acrossthe'collector beneath the.steam supply pipes and above the dischargeends of the pipes e which latter discharge the highly heated water fromthe generating element into the steam collector, and these baflie platesor covers also serve to deflect the water discharging from the pipes eand thus cause separation of the steam therefrom without permitting thewater to enter the steam supply pipes.

During the operation of a steam generator constructed in accordance withthe present invention, the water passes say, from the collector H intothe elbow 8 and from the latter into the first tube of the correspondingfeed water heating element, the water traversing the various tubes ofthis generator in a direction from front to back and rising thereinuntil it finally reaches the thence to the inlets.

outlet 9, the water being thence conducted through the pipes 10, 11 or12 as the case may be to the manifold i and from the latter the feedwater thus heated is introduced 'into the feed collector through theinlets I.- The water from the two outermost feed water heating elementspasses directly to the respective inlets, while that from the middle orintermediate feed water heating element passes first to the manifold andThe feed water thus supplied to the feed collector mingles with thewater which enters the collector through the vertical tubes e which leadfrom the vaporizing or steam generating elements, this mingling,however, occurring after steam has been liberated from such water. Thetransverse partition M, as previously stated, divides the collector intoseparate compartments, and the lines Y in Fig. 4 indicate the anglethrough which the boiler may tilt before the top of this partition islevel with the opposite outlet ends of the collector.

the horizontal. Under those conditions, in order to insure the return ofthe water on the raised side of the boiler, it is only necessary thatthe axes ZZ of the supplemental return pipes f should have aninclination exceeding by two or three degrees that of the correspondingline YY. As

In the present instance, these lines indicate an inclination of, say, 8to the feed inlets are arranged between the ordinary or main returnpipes F and the supplemental return pipes f, the ship is able tomaintain a constant list equal to the inclination of the line YY, as onthe higher side, the water will flow through the supplemental returnpipe f while on the lower side, the water will flow out of the collectorthrough the ordinary or main return pipe F whereby the two sides of thegenerator will receive an equal feed.

It will appear from the drawing that the elements of the feed waterheater are located between the vaporizing elements and the upperreservoir which serves as a purifier and collector for the steam and thefeed water. This same arrangement could be used if the elements of steamsuperheaters or economizers were to be combined with the feed waterheater in which case the elev ments constituting the superheater would,of course, be located below those forming the feed water heater. Amongthe advantages of this arrangement may be mentioned, the

fact that the feed water tubes are arranged as low as possible and areconsequently conveniently accessible for inspection and repair and,moreover, the height of the boiler is materially reduced as comparedwith structures wherein the economizer or feed waterheater is arrangedabove the steam drum.

Having now particularly described and &

transversely at the upper portion of the generator and communicatingwith the generator element, said collector being provided with 'meansfor dividing it transversely to control the flow of water toward itsends due to the transverse inclination of the generator, a lower feedcollector communicating with the generator element, a pair of returnpipes connecting the respective ends of the steam collector to the feedcollector', and supplemental return. pipes communica-ting with portionsof the-steam coliector intermediate its ends and also communicating withthe feed collector.

2. A steam generator comprising a steamcollector extending transverselythereof and communicating with the steam generating element, saidcollector being provided with an intermediate transverse partition fordividing the water space thereof, return pipes leading from therespective ends of a the collector, and a air of supplemental returnpipes leading rom the steam collector at o1nts intermediate its ends andhaving them discharge ends inclined downwardly and communicatingwith thereturn pipes leading from the ends of the collector.

3. A steam generator comprising a vaporizing element composed of a pairof units, a feed collector communicating with both units, a steamcollector extending transversely of the generator and divided into apair of compartments which communicate with the respective units of thevaporizing element, a pair of return pipes leading from the ends of thesteam collector to the feed collector, and supplemental return pipesleading from points intermediate the ends of the steam collector anddischarging into the return pipes first mentioned.

4. Asteam generator of the class described comprising a eneratingelement, a steam collector exten ing transyersely of the generator andof the upper portion thereof, a feed collector also extending.transversely of the generator below the steam collector,

and a pair of automatic feed regulators arranged on the opposite sidesof the generator and discharging into the feed collector, saidregulators being connected to a suitable source of feed water supply andbeing provided with individually operable valves, the openings of whichare controlled according to the transverse inclination of the generator,the sum of the openings of the valves remaining substantially constant.

5. Asteam generator of the class described comprising a generatingelement, a feed water heater composed of a plurality of units, a feedcollector communicating with the several units of the feed water heater,a steam collector connected to receive the water discharged from theseveral units of the feed water heater and having a transverse partitiondividing the water space thereof, return pipes leading from therespective ends of the steam collector to the generating element, and apair of feed water regulators located toward the lateral sides of thegenerator and having individual feed water connections which dischargeinto the respective ends of the feed collector.

6. Asteam generator of the class described comprising a generating orvaporizing element, a feed collector communicating with said element, asteam collector connected to receive Water discharging from thegenerating element, a feed water heater also connected to dischargewater into the steam collector,'a second feed collector communicatingwith the feed water heater, a pair of feed Water regulators bothdischarging into the feed collector for the feed water heater, a pair ofreturn pipes leading from the ends of the steam collector to thecorrespondingends of the feed collector for the generating element, anda air of supplemental return pipes leading rom the steam collector atpoints intermediate its ends and discharging into the return pipes firstmentioned.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

Witnesses:

H. C. Coxn, EMILE KLo'rz;

